🔍 Key Concepts

• How special use areas are shown on river charts • Differences between structures along the bank (like revetments and dikes) versus designated areas in the river • How fleeting or mooring areas are typically marked compared to disposal areas

💭 Think About

• Look at the shape and position: Is a large broken-line rectangle more likely to mark a structure built into the bank, or a zone on the water where an activity is allowed? • Think about which of these choices would logically need a clearly defined rectangular boundary for traffic management and planning. • Ask yourself which feature would most concern a pilot navigating tows who needs to know where they may or may not place barges.

✅ Before You Answer

• Is the symbol showing a structure attached to shore or a designated water area? • Which of the listed items is commonly organized in neat rectangular blocks rather than irregular shapes along the riverbank? • Check your chart-legend memory: which feature is typically shown by a dashed or broken-line polygon enclosing an area?